/* ==========================================================================
   Pratham Optics — brand tokens & base styles
   Two-color brand system: orange + near-black, on white/grey neutrals.
   ========================================================================== */

:root {
  color-scheme: light;
  --color-orange: #EE7203;
  --color-orange-dark: #C95F00;
  --color-orange-light: #FDECDD;
  --color-ink: #0A0A0A;
  --color-white: #FFFFFF;
  --color-grey-bg: #F2F2F2;
  --color-grey-panel: #D9DADB;
  --color-grey-text: #5B5B5C;

  --font-sans: "Poppins", "Segoe UI", system-ui, -apple-system, sans-serif;

  --radius-md: 14px;
  --radius-lg: 22px;
  --container-w: 1100px;
  --space-section: clamp(3rem, 6vw, 6rem);
}

/* This site intentionally stays single-theme (light) regardless of the
   visitor's OS/browser dark-mode setting. The brand lockup is a set of
   fixed PNG logo images (on-white / on-orange / on-grey) that were
   deliberately approved as-is — they can't repaint themselves the way a
   CSS color token can, so letting the page auto-switch to a dark palette
   left the on-white (black-ink) header logo sitting on a near-black
   background and effectively invisible. One consistent brand look, always
   rendered correctly, beats a dark variant that silently breaks the logo. */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-white);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.container--narrow { max-width: 720px; }
h1, h2, h3 { font-weight: 700; line-height: 1.15; margin: 0 0 0.6em; }
h1 { font-size: clamp(1.9rem, 4.2vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; color: var(--color-grey-text); }
.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-orange);
  margin-bottom: 0.6em;
}
.section { padding: var(--space-section) 0; }
.section--grey { background: var(--color-grey-bg); }
.section-head { max-width: 640px; margin: 0 auto 2.5rem; text-align: center; }
.section-head p { margin: 0; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.85em 1.5em;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 2px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--color-orange); color: #fff; }
.btn--primary:hover { box-shadow: 0 8px 20px rgba(238,114,3,0.35); }
.btn--outline { background: transparent; color: var(--color-ink); border-color: var(--color-ink); }
.btn--outline-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.7); }
.btn--ghost-on-orange { background: rgba(255,255,255,0.14); color: #fff; border-color: rgba(255,255,255,0.5); }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.9rem; }
.cta-row--spaced { margin-top: 1.2rem; }
.cta-row--center { justify-content: center; }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 40;
  background: var(--color-white);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 0.9rem; padding-bottom: 0.9rem;
}
.brand-logo { display: flex; align-items: center; }
.brand-logo img { height: 96px; width: 96px; display: block; }
@media (max-width: 640px) {
  .site-header .container { padding-top: 0.7rem; padding-bottom: 0.7rem; }
  .brand-logo img { height: 68px; width: 68px; }
}
.header-actions { display: flex; align-items: center; gap: 1rem; flex-wrap: nowrap; }
.header-actions .btn { padding: 0.6em 1.1em; font-size: 0.9rem; white-space: nowrap; }
@media (max-width: 640px) {
  .header-actions .btn .tel-num { display: none; }
  .header-actions { gap: 0.75rem; }
  .header-actions .btn { padding: 0.65em 0.85em; font-size: 0.85rem; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  background: linear-gradient(180deg, var(--color-orange-light) 0%, var(--color-white) 78%);
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3rem);
}
.hero-grid {
  display: grid; gap: 2.5rem; align-items: center;
  grid-template-columns: 1.1fr 0.9fr;
}
@media (max-width: 820px) { .hero-grid { grid-template-columns: 1fr; } }
.hero-copy p.lead { font-size: 1.1rem; color: var(--color-ink); opacity: 0.75; }
.hero-visual {
  background: var(--color-orange);
  border-radius: var(--radius-lg);
  aspect-ratio: 4 / 3;
  overflow: hidden;
  position: relative;
}
.hero-visual img { width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-slides { position: relative; width: 100%; height: 100%; }
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0;
  transition: opacity 0.7s ease;
}
.hero-slide.is-active { opacity: 1; z-index: 1; }
.hero-dots {
  position: absolute; left: 0; right: 0; bottom: 0.9rem; z-index: 2;
  display: flex; justify-content: center; gap: 0.5rem;
}
.hero-dot {
  all: unset; box-sizing: border-box; cursor: pointer;
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,255,255,0.55);
  border: 1px solid rgba(0,0,0,0.12);
  transition: background 0.15s ease, transform 0.15s ease;
}
.hero-dot.is-active { background: #fff; transform: scale(1.25); }
.hero-dot:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  .hero-slide { transition: none; }
}
.hero-trustbar {
  margin-top: 2.2rem; display: flex; flex-wrap: wrap; align-items: center;
  gap: 0.6rem 0; row-gap: 0.6rem;
  font-size: 0.95rem; font-weight: 600; color: var(--color-ink);
}
.hero-trustbar .stat { white-space: nowrap; }
.hero-trustbar .divider { color: var(--color-grey-text); font-weight: 400; margin: 0 0.9rem; }
@media (max-width: 560px) { .hero-trustbar .divider { margin: 0 0.6rem; } }

/* ==========================================================================
   Offer banner
   ========================================================================== */
.offer-banner {
  background: var(--color-orange-light);
  border-bottom: 1px solid rgba(238,114,3,0.18);
}
.offer-banner .container {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 1rem; padding-top: 0.9rem; padding-bottom: 0.9rem;
}
.offer-banner p { margin: 0; color: var(--color-ink); font-size: 0.94rem; }
.offer-banner strong { color: var(--color-orange-dark); }
.offer-banner .btn { padding: 0.55em 1.15em; font-size: 0.85rem; }

/* ==========================================================================
   Category chip nav (Zenni/GlassesUSA-style quick browse)
   ========================================================================== */
.chip-row {
  display: flex; gap: 0.6rem; overflow-x: auto; padding: 0.2rem 0 0.4rem;
  -ms-overflow-style: none; scrollbar-width: none;
}
.chip-row::-webkit-scrollbar { display: none; }
.chip {
  flex-shrink: 0;
  display: inline-flex; align-items: center;
  padding: 0.55em 1.1em;
  border-radius: 999px;
  border: 1.5px solid rgba(10,10,10,0.14);
  font-size: 0.86rem; font-weight: 600;
  text-decoration: none; color: var(--color-ink);
  background: var(--color-white);
  white-space: nowrap;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.chip:hover { border-color: var(--color-orange); background: var(--color-orange-light); }

/* ==========================================================================
   Process strip (real, numbered sequence — eye testing to packaging)
   ========================================================================== */
.process-strip {
  display: grid; gap: 0.9rem;
  grid-template-columns: repeat(7, 1fr);
}
@media (max-width: 980px) { .process-strip { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 620px) { .process-strip { grid-template-columns: repeat(2, 1fr); } }
.process-step { text-align: left; border-top: 3px solid var(--color-orange); }
.process-step .step-num { font-size: 0.78rem; font-weight: 700; color: var(--color-orange); display: block; margin-bottom: 0.4em; }
.process-step .step-title { font-size: 0.92rem; font-weight: 700; color: var(--color-ink); display: block; }

/* ==========================================================================
   Accordion (process steps + eye-health tips)
   ========================================================================== */
.accordion-trigger {
  all: unset; box-sizing: border-box; cursor: pointer;
  display: block; width: 100%; padding: 1rem 0.2rem;
  font-family: inherit; color: inherit;
}
.accordion-trigger:focus-visible { outline: 2px solid var(--color-orange); outline-offset: 2px; border-radius: 4px; }
.accordion-chevron {
  display: inline-block; width: 0.5em; height: 0.5em;
  border-right: 2px solid var(--color-orange); border-bottom: 2px solid var(--color-orange);
  transform: rotate(45deg); margin-left: 0.5em; transition: transform 0.15s ease;
  vertical-align: middle;
}
.accordion-trigger[aria-expanded="true"] .accordion-chevron { transform: rotate(-135deg); }
.accordion-panel { padding: 0 0.2rem 0.9rem; }
.accordion-panel p { font-size: 0.88rem; color: var(--color-grey-text); margin: 0; }

.accordion-trigger--tip {
  display: inline-flex; align-items: center; width: auto; padding: 0.6em 0 0;
  font-size: 0.85rem; font-weight: 600; color: var(--color-orange-dark);
}
.tip .accordion-panel { padding: 0.6em 0 0; }
.tip .accordion-panel p { font-size: 0.88rem; }

/* ==========================================================================
   Simple 2-up photo gallery
   ========================================================================== */
.gallery-2up { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.1rem; }
@media (max-width: 560px) { .gallery-2up { grid-template-columns: 1fr; } }
.gallery-2up figure { margin: 0; border-radius: var(--radius-md); overflow: hidden; aspect-ratio: 4/3; }
.gallery-2up img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ==========================================================================
   "Who it's for" — three illustrated avatars (men / women / kids)
   ========================================================================== */
.wear-trio {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 720px;
  margin: 0 auto 2.75rem;
}
@media (max-width: 560px) { .wear-trio { grid-template-columns: repeat(2, 1fr); gap: 1.4rem 0.9rem; } }
.wear-trio figure { margin: 0; text-align: center; }
.wear-trio img {
  width: 100%;
  max-width: 132px;
  aspect-ratio: 1/1;
  margin: 0 auto;
  border-radius: 50%;
  background: var(--color-grey-bg);
}
.wear-trio figcaption {
  margin-top: 0.7rem;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--color-ink);
}
.wear-trio figcaption span {
  display: block;
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--color-grey-text);
  margin-top: 0.1em;
}

/* ==========================================================================
   Styles gallery — curated frames, no pricing/SKU (not an e-com catalog)
   ========================================================================== */
.styles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.1rem;
}
@media (max-width: 820px) { .styles-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .styles-grid { grid-template-columns: repeat(2, 1fr); } }
.style-card {
  background: var(--color-white);
  border: 1px solid rgba(0,0,0,0.07);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.style-card:hover { border-color: var(--color-orange); transform: translateY(-2px); }
.style-card img { width: 100%; aspect-ratio: 1/1; object-fit: cover; display: block; background: var(--color-grey-bg); }
.style-card figcaption { padding: 0.7rem 0.85rem 0.9rem; }
.style-card .style-name { display: block; font-size: 0.88rem; font-weight: 600; overflow-wrap: break-word; hyphens: auto; }
.style-card .style-tag { display: block; font-size: 0.76rem; color: var(--color-grey-text); margin-top: 0.15em; overflow-wrap: break-word; hyphens: auto; }
@media (max-width: 640px) {
  .style-card .style-name { font-size: 0.82rem; }
  .style-card .style-tag { font-size: 0.72rem; }
  .style-card figcaption { padding: 0.6rem 0.7rem 0.8rem; }
}
.styles-note {
  text-align: center;
  font-size: 0.82rem;
  color: var(--color-grey-text);
  margin: 1.4rem 0 0;
}

/* ==========================================================================
   Category tiles (icon-driven, no stock photography needed)
   ========================================================================== */
.tile-grid {
  display: grid; gap: 1.25rem;
  grid-template-columns: repeat(3, 1fr);
}
@media (min-width: 821px) { .tile-grid--four { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 820px) { .tile-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .tile-grid { grid-template-columns: 1fr; } }
.tile {
  background: var(--color-white);
  border: 1px solid rgba(0,0,0,0.07);
  border-radius: var(--radius-md);
  padding: 1.6rem 1.5rem;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.tile:hover { border-color: var(--color-orange); transform: translateY(-2px); }
.tile-icon {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--color-orange-light);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1rem;
}
.tile-icon svg { width: 26px; height: 26px; stroke: var(--color-orange); }
.tile h3 { margin-bottom: 0.35em; }
.tile p { margin: 0; font-size: 0.94rem; }
.tile p a { color: var(--color-orange); font-weight: 600; text-decoration: underline; text-underline-offset: 2px; white-space: nowrap; }

/* ==========================================================================
   Spotlight (personalized kids' sunglasses)
   ========================================================================== */
.spotlight {
  background: var(--color-white);
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3.5vw, 2.25rem);
  display: grid; gap: 1.75rem;
  grid-template-columns: 0.85fr 1.15fr;
  align-items: center;
}
@media (max-width: 780px) { .spotlight { grid-template-columns: 1fr; } }
.spotlight-visual {
  border-radius: var(--radius-md);
  aspect-ratio: 4/3;
  overflow: hidden;
}
.spotlight-visual img { width: 100%; height: 100%; object-fit: cover; display: block; }
.spotlight .badge {
  display: inline-block; font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--color-orange-dark); background: var(--color-orange-light);
  padding: 0.3em 0.7em; border-radius: 999px; margin-bottom: 0.7em;
}

/* ==========================================================================
   Trust / Why Pratham Optics
   ========================================================================== */
.trust-grid {
  display: grid; gap: 1.5rem;
  grid-template-columns: repeat(4, 1fr);
}
.trust-grid--spaced { margin-top: 2.5rem; }
@media (max-width: 900px) { .trust-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .trust-grid { grid-template-columns: 1fr; } }
.trust-item { text-align: center; padding: 0.5rem; }
.trust-item .num {
  font-size: 1.05rem; font-weight: 700; color: var(--color-orange);
  line-height: 1.3; min-height: 2.6em;
  display: flex; align-items: center; justify-content: center;
}
.trust-item p { font-size: 0.92rem; margin: 0.3em 0 0; }

/* ==========================================================================
   Eye health tips
   ========================================================================== */
.tip-list {
  display: grid; gap: 1.1rem;
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 900px) { .tip-list { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .tip-list { grid-template-columns: 1fr; } }
.tip { background: var(--color-white); border-radius: var(--radius-md); padding: 1.3rem; border: 1px solid rgba(0,0,0,0.06); }
.tip h3 { font-size: 1rem; margin-bottom: 0.3em; }
.tip p { font-size: 0.9rem; margin: 0; }

/* ==========================================================================
   Contact / map
   ========================================================================== */
.contact-grid {
  display: grid; gap: 2rem;
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card {
  background: var(--color-white);
  border: 1px solid rgba(0,0,0,0.07);
  border-radius: var(--radius-md);
  padding: 1.75rem;
}
.contact-card h3 { margin-bottom: 0.8rem; }
.contact-line { display: flex; gap: 0.7rem; margin-bottom: 0.9rem; font-size: 0.96rem; }
.contact-line .lbl { color: var(--color-grey-text); min-width: 84px; flex-shrink: 0; }
.map-embed { border-radius: var(--radius-md); overflow: hidden; border: 1px solid rgba(0,0,0,0.07); }
.map-embed iframe { width: 100%; height: 100%; min-height: 320px; border: 0; display: block; }

/* ==========================================================================
   Reviews CTA
   ========================================================================== */
.reviews-cta {
  text-align: center;
  background: var(--color-grey-panel);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 3rem);
}
.reviews-cta h2 { margin-bottom: 0.4em; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: var(--color-ink); color: rgba(255,255,255,0.85); padding: 3rem 0 6.5rem; }
.footer-logo { height: 40px; width: auto; margin-bottom: 0.9rem; }
.footer-tagline { max-width: 320px; }
.site-footer p { color: rgba(255,255,255,0.68); }
.footer-grid {
  display: grid; gap: 2rem;
  grid-template-columns: 1.3fr 1fr 1fr;
}
@media (max-width: 780px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { color: #fff; font-size: 0.95rem; margin: 0 0 0.8rem; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--color-orange); }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; font-size: 0.92rem; color: rgba(255,255,255,0.8); }
.social-row { display: flex; gap: 0.7rem; margin-top: 0.9rem; }
.social-row a {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.14);
  display: flex; align-items: center; justify-content: center;
}
.social-row a:hover { background: var(--color-orange); }
.social-row svg { width: 18px; height: 18px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.16);
  margin-top: 2.5rem; padding-top: 1.5rem;
  font-size: 0.82rem; color: rgba(255,255,255,0.68);
  display: flex; flex-wrap: wrap; gap: 0.6rem 1.2rem; justify-content: space-between;
}
.footer-bottom a { color: rgba(255,255,255,0.75); }

/* header social icons */
.header-social { display: flex; gap: 0.45rem; margin-right: 0.3rem; }
.header-social a {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--color-grey-bg);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-ink);
}
.header-social a:hover { background: var(--color-orange); color: #fff; }
.header-social svg { width: 16px; height: 16px; }
@media (max-width: 640px) { .header-social { display: none; } }

/* ==========================================================================
   Sticky mobile action bar
   ========================================================================== */
.mobile-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
  display: none;
  background: var(--color-white);
  border-top: 1px solid rgba(0,0,0,0.08);
  box-shadow: 0 -6px 18px rgba(0,0,0,0.08);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.mobile-bar .row { display: grid; grid-template-columns: 1fr 1fr; }
.mobile-bar a {
  display: flex; align-items: center; justify-content: center; gap: 0.5em;
  padding: 0.95rem 0; font-weight: 600; font-size: 0.92rem; text-decoration: none;
}
.mobile-bar a.call { color: var(--color-ink); border-right: 1px solid rgba(0,0,0,0.08); }
.mobile-bar a.whatsapp { background: var(--color-orange); color: #fff; }
@media (max-width: 700px) {
  .mobile-bar { display: block; }
  .site-footer { padding-bottom: 7rem; }
}

/* ==========================================================================
   Back to top
   ========================================================================== */
.back-to-top {
  position: fixed;
  right: 1.1rem;
  bottom: 1.4rem;
  z-index: 45;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--color-ink);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 20px rgba(0,0,0,0.22);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.back-to-top.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { transform: translateY(-2px); }
@media (max-width: 700px) {
  .back-to-top { bottom: calc(4.6rem + env(safe-area-inset-bottom, 0px)); right: 0.9rem; width: 40px; height: 40px; }
}
@media (prefers-reduced-motion: reduce) {
  .back-to-top { transition: opacity 0.2s ease; }
}

/* 404 */
.error-page { text-align: center; padding: 6rem 1.25rem; }